Install MentorFM

In order to install MentorFM with GNOME Software,
launch GNOME Software, search for MentorFM and
finally click the Install button.

Then log out and log in back to let your desktop
environment (e.g., GNOME Shell) find out that
a new application has been installed. Otherwise, you may see mismatched
application icons and other funny bugs.

Then log out and log in back to let your desktop
environment (e.g., GNOME Shell) find out that
a new application has been installed. Otherwise, you may see mismatched
application icons and other funny bugs.

Launch MentorFM

You should be able to find MentorFM in a list of installed applications. If not, you may have forgotten
to log out and log in and your desktop environment (e.g., GNOME Shell) has not find out yet
that a new application has been installed.

Alternatively, you can launch MentorFM from a terminal:
flatpak run eu.tiliado.NuvolaAppMentorfm